Sgs 07144 Micro Drill Bit No. 65 0.0350 in Solid Carbide

Product Description

The SGS 07144 is a solid carbide micro drill bit designed for very small hole drilling in demanding metalworking applications. It carries a wire gauge size of No. 65 with a decimal diameter of 0.0350 inches and a four-facet point ground to 130 degrees. The bit features a Ti-NAMITE-A coating for extended tool life and reduced friction. Overall length is 1.5000 inches with a spiral flute length of 0.3000 inches. The web-thinned design reduces thrust load at entry, which is critical when drilling at this diameter. Machinists, tool-and-die workers, and precision fabricators are the primary users of this bit.

This micro drill bit is suited for applications requiring tight-tolerance bores in hard and difficult-to-machine materials. It performs in production environments including aerospace component fabrication, precision mold work, and instrumentation manufacturing where small-diameter holes must meet close tolerances. The straight cylindrical shank measures 0.1250 inches (1/8 inch) in diameter, compatible with standard collet chucks and drill chucks accepting that shank size. Maximum recommended drilling depth is 0.4000 inches, consistent with the 11xD flute-to-diameter ratio of the M105 series.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• Ti-NAMITE-A coating reduces friction and extends tool life in steel and stainless steel
• Four-facet, web-thinned point at 130 degrees reduces entry thrust and improves centering
• Spiral flute type with regular helix promotes chip evacuation in deep micro-holes
• Diameter tolerance held to +0.0000 to +0.0003 inches for consistent hole sizing
• Right-hand cutting direction, compatible with standard CNC and manual spindles

Compatibility

Designed for drilling very small holes in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. Fits any spindle or chuck accepting a 0.1250-inch straight cylindrical shank. Conforms to KSPT ISO standards for micro drill geometry.

Installation Notes

This bit should be installed in a precision collet or drill chuck rated for the 0.1250-inch shank diameter; runout must be minimized at this scale to prevent breakage. Ensure the machine spindle is fully stopped and locked before bit changes. Use appropriate cutting fluid or mist coolant where the workpiece material and machine setup permit, as this bit does not support through-coolant. At 0.0350 inches diameter, feed rate and RPM must be dialed to manufacturer recommendations for carbide micro drills to avoid bit fracture.